It would be nice to have dolphin display "diff" output when "File Already Exists" at the destination path. It already does some metadata comparison which is superb. Output from diff to quickly peek into the contents would be very nice. Just a request. Maybe others will also find it useful. thanks Reproducible: Always
Handling the copying/moving of files and showing that dialog is handled by KIO -> I'll reassign this report.
*** This bug has been marked as a duplicate of bug 291039 ***